Thermal sprayed cemented carbides such as WC–Co(Cr) and Cr3C2–NiCr coatings are well known and widely used for wear protection purposes. Nanocarbides in cermets have shown promising results in gaining the hardness , wear performance in abrasion, cavitation  or slurry type of wear conditions. Even friction properties have been reported to be improved by the use of nanocarbides. The driving force for reducing the carbide grain size comes from the fact that, as the carbide size becomes smaller, the binder mean free path is reduced, resulting in higher resistance to deformation and material loss. Many researchers have pursued such a hypothesis so as to improve the wear performance of HVOF WC–Co by reducing the WC grain size to the nanoscale.

The global energy demand has increased due to rapid population growth. The depletion of energy sources and increase in energy demand have urged researchers worldwide to study the electrochemical energy storages system, such as batteries, conventional dielectric capacitors, and fuel cells. Supercapacitors are one of the electrochemical capacitors that have attracted much research interest because of their long cycle life, high power density, excellent reversibility, environment friendly and higher safety.